Over the last few years the application of Artificial Intelligence techniques has become a major research topic in process control. AI techniques allow obtaining efficient controllers that utilize human experience in more related form than mathematical approach. Fuzzy Logic (FL) is the main topic of this new field known as Expert Control. It provides an effective framework for dealing with uncertain and vague environment. It uses Fuzzy Logic Controllers (FLCs) to implement an operator approximate reasoning process in the selection of control process. According to a survey 6 of every 10 Americans use a device that employ FLC in some form.